<template>
    <div class="top-category">
        <div class="container" v-if="topCategory && topCategory.children">
            <RouterView/>
            <!-- 1 面包屑 -->
            <XtxBread>
                <XtxBreadItem :to="{ path: '/' }">首页</XtxBreadItem>
                <transition name="fade-el" mode="out-in">
                    <XtxBreadItem :key="topCategory.id">{{ topCategory.name }}</XtxBreadItem>
                </transition>
            </XtxBread>
            <!-- 2 轮播图 -->
            <XtxCarousel :sliders="list" style="height:500px" />
            <!-- 所有二级分类 -->
            <div class="sub-list">
                <h3>全部分类</h3>
                <ul>
                    <li v-for="i in topCategory.children" :key="i">
                        <a href="javascript:;">
                            <img :src="i.picture">
                            <p>{{ i.name }}</p>
                        </a>
                    </li>
                </ul>
            </div>
            <!-- 分类关联商品 -->
            <div class="ref-goods" v-for="item in subList" :key="item.id">
                <div class="head">
                    <h3>- {{ item.name }} -</h3>
                    <p class="tag">{{ item.desc }}</p>
                    <XtxMore />
                </div>
                <div class="body">
                    <GoodsItem v-for="i in item.goods" :key="i.id" :goods="i" />
                </div>
            </div>
        </div>
    </div>
</template>
   
<script>
import { ref, computed, watch } from 'vue'
import { useStore } from 'vuex'
import { useRoute } from 'vue-router'
import { findBanner } from '@/api/home'
import { findTopCategory } from '@/api/category'
import GoodsItem from './components/goods-item.vue'

export default {
    name: 'Category',
    components: {
        GoodsItem
    },
    setup() {
        const list = ref([])
        findBanner().then(res => {
            list.value = res.result
        })
        const store = useStore()
        const route = useRoute()
        const topCategory = computed(() => {
            return store.state.category.list.find((item) => item.id === route.params.id)
        })

        //推荐商品
        const subList = ref([])
        const getSubList = () => {
            findTopCategory(route.params.id).then(res => {
                subList.value = res.result.children
            })
        }
        watch(() => route.params.id, (newValue) => {
            // newValue && getSubList()
            if(newValue && `/category/${newValue}` === route.path) getSubList()
        }, { immediate: true })



        return {
            topCategory,
            list,
            subList
        }
    }
}
</script>
   
   
   
<style scoped lang='less'>
.top-category {
    h3 {
        font-size: 28px;
        color: #666;
        font-weight: normal;
        text-align: center;
        line-height: 100px;
    }

    .sub-list {
        margin-top: 20px;
        background-color: #fff;

        ul {
            display: flex;
            padding: 0 32px;
            flex-wrap: wrap;

            li {
                width: 168px;
                height: 160px;

                a {
                    text-align: center;
                    display: block;
                    font-size: 16px;

                    img {
                        width: 100px;
                        height: 100px;
                    }

                    p {
                        line-height: 40px;
                    }

                    &:hover {
                        color: @xtxColor;
                    }
                }
            }
        }
    }
}

.ref-goods {
    background-color: #fff;
    margin-top: 20px;
    position: relative;

    .head {
        .xtx-more {
            position: absolute;
            top: 20px;
            right: 20px;
        }

        .tag {
            text-align: center;
            color: #999;
            font-size: 20px;
            position: relative;
            top: -20px;
        }
    }

    .body {
        display: flex;
        justify-content: flex-start;
        flex-wrap: wrap;
        padding: 0 65px 30px;
    }
}
</style>